normalizing hours based on new hourly rate

Happy new year everyone.
I have an old hourly rate of $70/hour
I have a new hourly rate of $100/hour
My spreadsheet tracks my hours worked and revenue based on the old hourly rate. So I cant log 6 hours for this new client because then the total would be $420 ($70*6). Instead I need to put a formula that would calculate an adjustment of hours based on that old rate. The spreadsheet shows that $100/hour is a 42.9% increase over $70/hour, but what do I log for the hours worked in cell D11 to normalize that rate?

Hi
your thread has null answers but nonetheless indicated as " Solved" . Is this correct?

Great.
Care to share the solution with the board when you have a moment?